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Energies
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Power Quality in the Modeling of Machines and Electrical Devices
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Power Quality in the Modeling of Machines and Electrical Devices

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F: Electrical Engineering".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 6560

Special Issue Editors

Prof. Lluís Monjo

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Guest Editor
Department of Industrial Systems and Design, Universidad Jaume I, 12071 Castellon de la Plana, Spain
Interests: power quality; electrical machines; renewable generation
Dr. Agusti Egea-Alvarez

E-Mail Website
Guest Editor
Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XW, UK
Interests: grid forming and virtual synchronous machine converter control algorithms; control of voltage source converters to weak grids and low inertia systems; alternative HVDC connection schemes for offshore wind farm; control and operation of DC–DC converters for HVDC systems
Special Issues, Collections and Topics in MDPI journals
Dr. Luis Sainz Sapera

E-Mail Website
Guest Editor
Department of Electrical Engineering, Universitat Politècnica de Catalunya, Campus Nord, Carrer de Jordi Girona, 1, 3, 08034 Barcelona, Spain
Interests: power quality; harmonics; voltage sags; unbalances; impedance-based stability criteria; grid-connected converters
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We invite you to submit your original research or overview papers to this Special Issue on the “Power Quality in the Modeling of Electrical machines and devices” in Energies.

This Special Issue will deal with the effects of power quality issues in the modeling of electrical machines and drives and mitigation techniques.

With the increasing number of non-linear loads, renewable energy sources, and power electronic converters connected to the grid, new power quality challenges arise due to the injection of harmonics of the mentioned devices. Standard power network equipment such as electrical rotating machines and transformers are very sensitive to distorted waveforms, leading to malfunctioning and overheating. The mitigation of the harmonics and refining of power-quality-oriented modeling of standard power network equipment are a fundamental research line to achieve the zero net targets set by the Paris agreement. Power electronics loads and typical power quality problems such as unbalances and flicker can also have an impact on these elements, and thus, further research is required.

In this Special Issue, we welcome contributions within the general area of power quality, modeling of electrical machines, and mitigation techniques, including advanced converter controllers.

Topics include but are not limited to:

  • Electrical machines and devices harmonic modelization and simulation;
  • Impact of power quality on electrical machines and devices performance;
  • Strategies for power quality issue mitigation;
  • Advanced converter controllers with a focus on power quality;
  • Impact of renewable-based generation on power quality.

Prof. Lluís Monjo
Dr. Agustí Egea Álvarez
Dr. Luis Sainz Sapera
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Power quality
  • Harmonics
  • Unbalances
  • Electrical machines
  • Electrical devices
  • Mitigation techniques

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Published Papers (3 papers)

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Research

13 pages, 3705 KiB  
Article
Improved Method for Determining Voltage Unbalance Factor Using Induction Motors
by Luis Guasch-Pesquer, Sara García-Ríos, Adolfo Andres Jaramillo-Matta and Enric Vidal-Idiarte
Energies 2022, 15(23), 9232; https://doi.org/10.3390/en15239232 - 6 Dec 2022
Cited by 2 | Viewed by 2049
Abstract
This work shows an alternative method to determine the Voltage Unbalance Factor in a power grid by using both the mean value of the line voltages and Current Unbalance Factor in induction motors. Twenty unbalanced voltage points on three induction motors were used [...] Read more.
This work shows an alternative method to determine the Voltage Unbalance Factor in a power grid by using both the mean value of the line voltages and Current Unbalance Factor in induction motors. Twenty unbalanced voltage points on three induction motors were used in order to compare the two methods. The influence of the measurement error of both the voltmeters and the ammeters on the resulting Voltage Unbalance Factor was studied, and the validation was made with laboratory data for one of the three motors analyzed, in addition to the simulations carried out. The proposed Voltage Unbalance Factor was compared with the most typical method in the standards to obtain this factor, showing that the proposed factor has a better approach than the standard factor to determine the value of the Voltage Unbalance Factor in an unbalanced power system. Full article
(This article belongs to the Special Issue Power Quality in the Modeling of Machines and Electrical Devices)
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21 pages, 2955 KiB  
Article
An Appropriate Index to Assess the Global Cancellation Level of the Harmonic Currents Consumed by a Set of Single-Phase Uncontrolled Rectifiers and a Set of Fluorescent Lamps
by Juan José Mesas, Luis Sainz, Lluís Monjo and Joaquín Pedra
Energies 2022, 15(12), 4315; https://doi.org/10.3390/en15124315 - 13 Jun 2022
Cited by 1 | Viewed by 1318
Abstract
An in-depth study of harmonic current reduction in European commercial buildings due to the harmonic cancellation effect when a set of single-phase uncontrolled rectifiers and a set of fluorescent lamps are connected at the same voltage level is essential, since both types of [...] Read more.
An in-depth study of harmonic current reduction in European commercial buildings due to the harmonic cancellation effect when a set of single-phase uncontrolled rectifiers and a set of fluorescent lamps are connected at the same voltage level is essential, since both types of non-linear loads are very present in commercial and residential sectors. This paper provides an appropriate index to assess the global cancellation level of the harmonic currents for this study. The equivalent circuit per phase of the typical three-phase power system of European commercial installations is presented and simplified for the cancellation analysis of the harmonic currents consumed by a set of multiple identical single-phase uncontrolled rectifiers and a set of multiple identical fluorescent lamps connected at the same voltage level. The suitability and usefulness of the proposed index are shown by applying it to that analysis, which leads to some results of practical interest. This index can be generalized to any number of sets of multiple identical non-linear loads and can be applied in graphical and optimization studies that will allow a greater benefit from the harmonic cancellation effect to be obtained given the global nature of the index. Full article
(This article belongs to the Special Issue Power Quality in the Modeling of Machines and Electrical Devices)
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17 pages, 7208 KiB  
Article
Impedance Matching-Based Power Flow Analysis for UPQC in Three-Phase Four-Wire Systems
by Xiaojun Zhao, Xiuhui Chai, Xiaoqiang Guo, Ahmad Waseem, Xiaohuan Wang and Chunjiang Zhang
Energies 2021, 14(9), 2702; https://doi.org/10.3390/en14092702 - 8 May 2021
Cited by 9 | Viewed by 2073
Abstract
Different from the extant power flow analysis methods, this paper discusses the power flows for the unified power quality conditioner (UPQC) in three-phase four-wire systems from the point of view of impedance matching. To this end, combined with the designed control strategies, the [...] Read more.
Different from the extant power flow analysis methods, this paper discusses the power flows for the unified power quality conditioner (UPQC) in three-phase four-wire systems from the point of view of impedance matching. To this end, combined with the designed control strategies, the establishing method of the UPQC impedance model is presented, and on this basis, the UPQC system can be equivalent to an adjustable impedance model. After that, a concept of impedance matching is introduced into this impedance model to study the operation principle for the UPQC system, i.e., how the system changes its operation states and power flow under the grid voltage variations through discussing the matching relationships among node impedances. In this way, the nodes of the series and parallel converter are matched into two sets of impedances in opposite directions, which mean that one converter operates in rectifier state to draw the energy and the other one operates in inverter state to transmit the energy. Consequently, no matter what grid voltages change, the system node impedances are dynamically matched to ensure that output equivalent impedances are always equal to load impedances, so as to realize impedance and power balances of the UPQC system. Finally, the correctness of the impedance matching-based power flow analysis is validated by the experimental results. Full article
(This article belongs to the Special Issue Power Quality in the Modeling of Machines and Electrical Devices)
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